I have successfully installed magma 1.3 in Ubuntu 11.x and have the following CPU and GPU:- i7 3930K and Intel Parallel Studio (which includes MKL) 2013 update 3 (downloaded and installed today)- nVidia GTX 670 and CUDA 5.0 (downloaded and installed today) which is at Kepler architecture and supports computing capability 3.0- My cuda installer version is cuda_5.0.35_linux_64_ubuntu11.10-1.run- My driver installer version is NVIDIA-Linux-x86_64-319.23.run

The problem is that compiling and running using "GPU_TARGET = Kepler" ./testing/testing_dgemm I get the following error "can not bind to texture" while my architecture is clearly Kepler, the errors and Gflop/s are totally off but that could be a consequence of whatever error leads to "can not bind to texture":

However, the double-precision performance on the GTX line will be MUCH slower than single-precision, like the 10x difference you observe. The CUBLAS gemm kernel has been optimized for Kepler, while the MAGMA gemm was only optimized for Fermi architectures. On Fermi they are basically the same performance. Therefore it's best to use the CUBLAS gemm.